Hey I've got the JDM b18c (gsr) and Im looking for a chipped p28 ecu to run uberdata, but the p28 ecu does not have a knock sensor. So I've been looking for a chipped p72 because It does have it. The person that is chipping my ecu for me, told me that the p27 (which i already have) is too hard to chip so he wanted me to buy a p28. My question is, if I run an ecu with out the knock sensor how badly will I endanger my motor and will this effect performance at all? TIA

Preach